Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:58:26 2013

Optimize a model with 36050 rows, 3600 columns and 109800 nonzeros
Presolve removed 2880 rows and 1822 columns
Presolve time: 0.23s
Presolved: 33170 rows, 1778 columns, 101049 nonzeros
Variable types: 27 continuous, 1751 integer (1751 binary)
Found heuristic solution: objective 74726.000000

Root relaxation: objective 5.561980e+04, 10183 iterations, 0.70 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 55619.8000    0   14 74726.0000 55619.8000  25.6%     -    1s
H    0     0                    55635.000000 55619.8000  0.03%     -    1s
H    0     0                    55628.000000 55619.8000  0.01%     -    1s
     0     0 55620.0000    0   15 55628.0000 55620.0000  0.01%     -    1s
     0     0 55620.0000    0   12 55628.0000 55620.0000  0.01%     -    1s
     0     0 55620.0000    0   22 55628.0000 55620.0000  0.01%     -    1s
     0     0 55620.0000    0   31 55628.0000 55620.0000  0.01%     -    1s
     0     0 55620.0668    0   39 55628.0000 55620.0668  0.01%     -    1s
     0     0 55620.2701    0   36 55628.0000 55620.2701  0.01%     -    1s
     0     0 55620.6159    0   41 55628.0000 55620.6159  0.01%     -    1s
     0     0 55620.7572    0   47 55628.0000 55620.7572  0.01%     -    1s
     0     0 55620.8304    0   50 55628.0000 55620.8304  0.01%     -    1s
     0     2 55620.9078    0   50 55628.0000 55620.9078  0.01%     -    1s
H   64    32                    55626.000000 55621.1784  0.01%  19.2    1s

Cutting planes:
  Gomory: 10
  MIR: 20
  Zero half: 8

Explored 64 nodes (12502 simplex iterations) in 1.87 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.562600000000e+04, best bound 5.562200000000e+04, gap 0.0072%